Oil burning apparatus



April 12, 1938. R. w. BECKETT OIL BURNING APP R TUS Filed Aug. 11,1936 1. INVEN TOR I WWW ATTORNEY Patented Apr. 12, .1938

OIL APPARATUS v Reginald W. Beckett; Rocky River,

to Cleveland Steel Products Corp., .Ohio, a corporation of Ohio Ohio,assignor Cleveland,

Application August 11, 1936, Serial No.195,397

8 Claims.

This invention relates to oil burning apparatus of the rotary type andmore particularly to electrical ignition means therefor.

One of the objects of the present invention is to provide new andimproved ignition means for oil burning apparatus of the rotary type.-Another object is to provide oil burning appa ratus of the so calledwall flame type in which oil and air-are discharged from a rotatingdistributingdevice against a substantially endless member spaced fromthe distributing device; with electrical ignition means of a characterwhich will quickly and efiiciently ignite the oil, and which will befree at all times from the for- 15 'mation' of carbon deposits.

A further object is to provide rotary oil burning apparatus with sparkignition means of improved construction in which carbon will not formupon the ignition electrodes, and in which the formation of carbonacross the spark gap is prevented.

With the above and other objects in view which will be apparentfrom thefollowing detailed description, the present invention consists incertain features of construction and com- -mounted within the furnace orshell I, which 5 y The oil burning apparatus, however. forms the subjectmatter of a copending application Serial No. 95,395, filed August 11,1936. Briefly this apparatus includes a supporting. structure 2 supportsa rotary oil and air projecting device 3 disposed above a refractoryhearth structure 4, and a driving motor 5 disposed below the hearthstructure 4.

Associated with the hearth structure 4 are spaced concentric inner andouter endless members e and 1 or heat resistant metal, the inner member6, being disposed below the path of travel of the oil thrown outwardlyby oil'discharge tubes 8 carried bythe projecting device 3. Mountedwithin the outerv member I, but

spaced outwardly pf the member 6 is an endless band 9 or ring of heatresistantmetal, and sup-' ported upon the upper edge of this band are aplurality of metallic directing or deflecting .elev merits l0. a Theband. 9 in the illustration shown, being of r metal, is grounded, andforms one of the electrodes for the ignition device.

'binations of parts to "be hereinafter described with reference to theaccompanying drawing, and then-claimed.

In the drawing which illustrates a suitable embodiment of the presentinvention, Fig. -1 is a horizontal section through a fur;

nace, taken above the oil burning unit,

Fig. 2 is an enlarged fragmentary plan view of the oil burning unit,showing in greater detail the ignition means and Asshown more clearly inFig. 3, the hearth structure 4, carries a pair of substantiallydiametrically opposed electrodes ll of j heat resistant metal, each ofwhich is vertically disposed and mounted in a non-conductive element I2Fig.3 is an. enlarged vertical section taken substantially upon line 3-4of Fig. 1.- f

In oil burning apparatus of the socalled r0 tary wall flame type, one ofthe disadvantages is that there is a tendency for carbon to form notonly. upon the ignition electrode or electrodes, but also across thespark gap. This is highly objectionable, both from the standpoint ofineiiicient and slow ignition and of explosions which frequently resultin carbon deposits onor acres the electrodes.

In the present invention, however, the. tendency toward carbon formationon the electrodes o and across the sparkgap is obviated.

Referring to the accompanying drawing in which like numerals refer tolike parts through, out the several views, the oil burning apparatus isshown in association with anannular shell I which defines a' furnacecombustion chamber. I It is to be understood, that one or more elec 55of electric spark ignition devices heretofore used carried by the hearthstructure 4, and extending 0 below the hearth structure,

' The lower ends of the electrodes H are pro vided with connector capsl3 which are connected by means of leads I with the terminals l5 of atransformer [6 supported below thehearth 5 structure.

Each electrode It extends well above the path of travel of the air beingdischarged by the fan blades l'|,of the distributingdevice 3 and isprovided with a reversely bent portion ill, the end I 9"40 of whichbends outwardly and extends over the inner endless member 6 andterminates in spaced relation with respect to' the flame ring, 9. Also,the reversely bent portions "of the electrodes are inclined from thevertical in the direction of '45, rotation of the projecting device 3',as indicated in Fig. 2, for a purpose to be later described. v As shownin Fig, 3, the tip 20 of the reversely bent portion i8 is disposedslightly belowthe upper edge of the endless member 8 and between themembers 6 and 9, and the member i is pro-' vided with anotch 2| inadvance of each electrode andextending downwardly tothe hearth structure4.

trodes ll may be employed and that they may be ofthe continuously orintermittently operating type, and, also, that a separate electrodeinstead of the ring or band 9 may be employed. In any event, theelectrode II has a portion extending above the path of the airdischarged by the projecting device 3 and this portion is, there-- fore,exposed to the heat of combustion so that it, during operation of theoil burning apparatus, becomes heated to, such an extent that any oilwhich may strike the tip 20 thereof is immediately vaporized, thuspreventing the formation of carbon on the tip 20. Also, the ring or band9 becomes heated to such an extent that the oil which impinges againstthe same is, during normal operation,'immediately vaporized, thus.

obviating the formation of carbon deposits.

As a further precaution against the formation of carbon deposits acrossthe electrodes, the

notches 2i are provided so that a portion of the the space, throughwhich the ignition sparks pass,

free from carbon deposits. This is also assisted by the fact that thereversely bent portions of the electrodes H are inclined from thevertical .in the direction of rotation of the projecting device 3whereby the sparks pass at least partially in the direction of travel ofthe air between the bands 6 and 9.

Although a single embodiment of the invention has been herein shown anddescribed, it will be understood that numerous modifications of theconstruction shown may be resorted to' without departing from the spiritof this invention as defined in the appended claims.

What I claim is:

1. In an oil burning apparatus for furnaces having a combustion chamber,a hearth element extending across the combustion chamber, a rotarydevice having a rotary oil and air projecting head disposed above saidhearth for projecting oil and air in generally horizontal paths, asubstantially endless element extending upwardly from said'hearth forintercepting. oil and air projected by said head, an ignition electrodehaving a spark discharge tip disposed adjacent the path of projected oiland spaced from said endlesselement, and a second element associatedwith said hearth and extending upwardly therefrom inwardly of said tipin spaced relation with respect tosaid first element for intercepting a.portion of the projected air, the upper edge of said second elementbeing disposed below the path of projected oil andhaving an openingtherein near said electrode tip, whereby a portion of the airintercepted by said second element'w'ill flow through said opening intothe space between said elements and travel through the space betweensaid spark discharge tip and first element. I

2 In an oil burning apparatus for furnaces havinga combustion chamber, ahearth element extending across the combustion chamber, a rotary devicehaving a rotary oil and air projecting head disposed above said hearthfor projecting oil and air in generally horizontal paths, asubstantially endless element ex-. tending upwardly from said hearth forintercepting oil and air projected by said head, an ignition electrodehaving a spark discharge tip disposed adjacent the path of projectedoil-and spaced from said endless element, and a second elementassociated with said hearth and extend ing upwardly therefrom inwardlyof and above said tip in spaced relation with respect to said firstelement for intercepting a portion of the projected air, the upper edgeof said second element being disposed below the path of projected 011,said electrode having a portion disposed out of the path of theprojected air and subjected to the heat of combustion, whereby saidelectrode, during normal operation, becomes suffiand a second elementassociated with said hearthand extending upwardly therefrom inwardly ofand above said tip in space-d relation with respect to said firstelement for intercepting a portion of the projected air, the upper edgeof said second element being disposed below the path of projected oiland having an opening therein, whereby a portion of the air interceptedby said second element will fiow through said opening into the spacebetween said elements and travel through the space between said sparkdischarge tip and first element, said electrode having a portiondisposed out of the path of the projected air and subjected to the heatof combustion, whereby said electrode, during normal operation of saidapparatus, becomes heated by the heat of com bustion tovaporize any oilwhich may contact said electrode tip.

4. In an oil burning apparatus; thecombination with an oil and airdischarging means for discharging oil and air in generally horizontalpaths, and an element in the path of the oil and air for interceptingthe same, of an electric ignition means igniting the oil intercepted bysaid element, including an electrode having atip portion disposedsubstantially in the path of the oil and a second portionthereof'disposed out of the path of the oil and air; discharged fromsaid first means and arranged to be.subjected to the heat of combustionwhereby said one electrode during normal operation of said apparatus,will be heated by the heat ofcombustion to vaporize oil which may strikesaid tip portion and thereby prevent the formation of carbon thereon,

5. An oil burning apparatus comprising means for discharging oil and airin generally horizon-'- tal paths, and ignition means including anelectrode disposed in the path of oil and air discharged by the firstmeans to intercept the, oil, and a second e'lectrode'of heat resistantmetal having a portion extending across the path of the oil and air anda reversely bent portion having a spark discharge tip spaced from saidfirst electrode and cooperative therewith to ignite the interceptedoil,at least the connection between saidfirst portion and said reverselybent portion ing normal operation of the apparatus, said tip spaced fromsaid first electrode and coop-- second electrode will becomesufficiently heated to vaporize any oil striking said tip and therebyprevent the formation of carbon thereon. v

6. An oil burning apparatus comprising means for discharging oil and airin generally horizontal paths, and ignition means including an electrodedisposed in the path of oil and air discharged by said first means tointercept the oil, and a second electrode of heat resistant'metal havinga spark discharge tip spaced from said first electrode cooperativetherewith to ignite the intercepted oil, said second electrode having aportion disposed out of jected to the heat of combustion, whereby saidsecond electrode, during normal operation, of the apparatus, will becomesufficiently heated to vaporize any oil which may strike said tip, andthereby prevent the formation of 'carbon thereon.

'7. An oil burning apparatus comprising a rotating head for projectingoil-and air in generally horizontal paths, an endless elementsur-v forin-' rounding said head in spaced relation, tercepting the oil, at leasta portion of the intercepting surface of said endless element forming anignition electrode and a second electrode of heat resistant metal havingthe path of the air and sub a spark discharge erative therewith toignite the intercepted oil, said second electrode having a portiondisposed out of the path of the air and subjected to the heat ofcombustion, whereby said second electrode, during normal operation ofthe apparatus, will become sufliciently heated to vaporize any oil whichmay strike said tip, and thereby prevent the, formation ofcarbon.thereon.

' '8. An oil burning apparatus comprising a rotating head for projectingoil and air in generally horizontal paths, a substantially endlessupright element ofheat resistant metal vfor inter-,- cepting the oil andair, said element forming one ignition electrode, a second electrode ofheat resistant metal having a spark discharge tipi spaced from saidfirst electrode and cooperative therewith toignite the intercepted oil,said second'] electrode having a portion disposed out of the path of theair and-subjected to-the heat of com- 1 bustion, whereby said secondelectrode, during normal operation .of the apparatus, will becomesuificlently heated} to vaporize any oil which may strike said tip andthereby prevent the formation of carbon thereon.

REGINALD w. BECKE'I'I.

